Whenever a religiously clean item touches a religiously unclean one and both of them or either one of them is wet enough for the moisture to be transferred to the other item, the religiously clean item would become religiously unclean. To make it religiously clean, if the religiously unclean substance is other than urine, after removing the religiously unclean substance, it is enough to wash it once with kurr, qalil or running water. In case of carpets, clothes and similar things it is an obligatory precaution to apply pressure and squeeze them in such a manner that the water that has entered their fabric is drained out. If one wants to make something that has become religiously unclean by urine clean with qalil water, water must be poured on the item once and if the urine itself does not remain on it then water should be poured once again for it to become religiously clean. But carpets and clothes should be squeezed each time for water to be drained out.
In any case, ghusl is not obligatory; unless one’s body touches a corpse after it has become cold and before it has been given ghusl. In case it does, in addition to washing that part of body which has touched the corpse, one must perform the ghusl of touching a corpse as well.
However, if a religiously clean item touches a najis thing and both are dry or their moisture is so little that its does not spread to the other thing, the religiously clean item does not become religiously unclean.
 Tawdīh al-Masā’il Marāja‘, v. 1, p. 88, number 125.
 Ibid, p.105, numbers 159 & 160.
 Ibid, p.306, numbers 531 & 522.
 Ayatuallah Bahjat’s and Makarem Shirazi’s verdict is that if one’s hand touches corpse which has not been given ghusl, although the corpse is dry, as a precaution one should wash his or her hand; Ibid, p.88, number 125.